O is the centre of the circle. Angle BOD 1320. The chords AD and BC meet at P. (a) (i) Calculate angles BAD and BCD. (ii) Explain why triangles ABP and CDP are similar. (iii) AP 6cm, PD = 8 cm, CP 3 cm and AB = 17-5 cm. Calculate the lengths of PB and CD. (iv) If the area of triangle ABP is ncm2, write down, in terms of n, the area of triangle CPD.

Circle

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Biochemical Oxygen Demand (BOD) SM 5210 B 48 hours; 300 1-L HDPE; 4°C Bromide EPA 300.0; 28 20; 125-mL HDPE 4°C; Carbon Dioxide SM 4500-CO. 2. D 24 hours 250 250-mL amber glass 4°C (no headspace) ... Chemical Oxygen Demand (COD) SM 5220 D(M) 28; 10 4-oz glass jar w/Teflon lid; 4°C Chloride EPA 300.0(M) 28 10;

Chemical, Demand, Oxygen, Chemical oxygen demand, Biochemical, Biochemical oxygen demand

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Circle, Biochemical Oxygen Demand, Chemical Oxygen Demand

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生物化学的酸素要求量（BOD）と化学的酸素要求量（COD）

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生物化学的酸素要求量（BOD）と化学的酸素要求量（COD）

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